BM2P034

The PWM type DC/DC converter (BM2Pxx4 Series) for AC/DC provide an optimum system for all products that include an electrical outlet. This IC supports both isolated and non-isolated devices, enabling simpler design of various types of low-power electrical converters. This IC built in a HV starter circuit that tolerates 650V, it contributes to low-power consumption. With current detection resistors as external devices, a higher degree of design freedom is achieved. Since current mode control is utilized, current is restricted in each cycle and excellent performance is demonstrated in bandwidth and transient response. The switching frequency is 65 kHz. At light load, the switching frequency is reduced and high efficiency is achieved. A frequency hopping function is also on chip. We can design easily, because this IC includes the switching MOSFET.

Applications

• AC adapters and household appliances (vacuum cleaners, humidifiers, air cleaners, air conditioners, IH cooking heaters, rice cookers, etc.)

Key features

• PWM frequency : 65kHz
• PWM current mode method
• Burst operation when load is light
• Frequency reduction function
• Built-in 650V start circuit
• Built-in 650V switching MOSFET
• VCC pin under voltage protection
• VCC pin overvoltage protection
• SOURCE pin Open protection
• SOURCE pin Short protection
• SOURCE pin Leading-Edge-Blanking function
• Per-cycle over current protection circuit
• Soft start
• Secondary Over current protection circuit